wikijs-fork/agent.js

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// ===========================================
// REQUARKS WIKI - Background Agent
// 1.0.0
// Licensed under AGPLv3
// ===========================================
global.ROOTPATH = __dirname;
global.PROCNAME = 'AGENT';
// ----------------------------------------
// Load Winston
// ----------------------------------------
var _isDebug = process.env.NODE_ENV === 'development';
global.winston = require('./lib/winston')(_isDebug);
// ----------------------------------------
// Fetch internal handshake key
// ----------------------------------------
if(!process.argv[2] || process.argv[2].length !== 40) {
winston.error('[WS] Illegal process start. Missing handshake key.');
process.exit(1);
}
global.WSInternalKey = process.argv[2];
// ----------------------------------------
// Load modules
// ----------------------------------------
winston.info('[AGENT] Background Agent is initializing...');
var appconfig = require('./models/config')('./config.yml');
let lcdata = require('./models/localdata').init(appconfig, 'agent');
global.git = require('./models/git').init(appconfig);
global.entries = require('./models/entries').init(appconfig);
global.mark = require('./models/markdown');
var _ = require('lodash');
var moment = require('moment');
var Promise = require('bluebird');
var fs = Promise.promisifyAll(require("fs-extra"));
var path = require('path');
var cron = require('cron').CronJob;
var readChunk = require('read-chunk');
var fileType = require('file-type');
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var farmhash = require('farmhash');
global.ws = require('socket.io-client')('http://localhost:' + appconfig.wsPort, { reconnectionAttempts: 10 });
const mimeImgTypes = ['image/png', 'image/jpg']
// ----------------------------------------
// Start Cron
// ----------------------------------------
var jobIsBusy = false;
var job = new cron({
cronTime: '0 */5 * * * *',
onTick: () => {
// Make sure we don't start two concurrent jobs
if(jobIsBusy) {
winston.warn('[AGENT] Previous job has not completed gracefully or is still running! Skipping for now. (This is not normal, you should investigate)');
return;
}
winston.info('[AGENT] Running all jobs...');
jobIsBusy = true;
// Prepare async job collector
let jobs = [];
let repoPath = path.resolve(ROOTPATH, appconfig.datadir.repo);
let dataPath = path.resolve(ROOTPATH, appconfig.datadir.db);
let uploadsPath = path.join(repoPath, 'uploads');
// ----------------------------------------
// Compile Jobs
// ----------------------------------------
//*****************************************
//-> Resync with Git remote
//*****************************************
jobs.push(git.onReady.then(() => {
return git.resync().then(() => {
//-> Stream all documents
let cacheJobs = [];
let jobCbStreamDocs_resolve = null,
jobCbStreamDocs = new Promise((resolve, reject) => {
jobCbStreamDocs_resolve = resolve;
});
fs.walk(repoPath).on('data', function (item) {
if(path.extname(item.path) === '.md') {
let entryPath = entries.parsePath(entries.getEntryPathFromFullPath(item.path));
let cachePath = entries.getCachePath(entryPath);
//-> Purge outdated cache
cacheJobs.push(
fs.statAsync(cachePath).then((st) => {
return moment(st.mtime).isBefore(item.stats.mtime) ? 'expired' : 'active';
}).catch((err) => {
return (err.code !== 'EEXIST') ? err : 'new';
}).then((fileStatus) => {
//-> Delete expired cache file
if(fileStatus === 'expired') {
return fs.unlinkAsync(cachePath).return(fileStatus);
}
return fileStatus;
}).then((fileStatus) => {
//-> Update cache and search index
if(fileStatus !== 'active') {
return entries.updateCache(entryPath);
}
return true;
})
);
}
}).on('end', () => {
jobCbStreamDocs_resolve(Promise.all(cacheJobs));
});
return jobCbStreamDocs;
});
}));
//*****************************************
//-> Refresh uploads data
//*****************************************
jobs.push(fs.readdirAsync(uploadsPath).then((ls) => {
return Promise.map(ls, (f) => {
return fs.statAsync(path.join(uploadsPath, f)).then((s) => { return { filename: f, stat: s }; });
}).filter((s) => { return s.stat.isDirectory(); }).then((arrDirs) => {
let folderNames = _.map(arrDirs, 'filename');
folderNames.unshift('');
ws.emit('uploadsSetFolders', {
auth: WSInternalKey,
content: folderNames
});
let allFiles = [];
// Travel each directory
return Promise.map(folderNames, (fldName) => {
let fldPath = path.join(uploadsPath, fldName);
return fs.readdirAsync(fldPath).then((fList) => {
return Promise.map(fList, (f) => {
let fPath = path.join(fldPath, f);
let fPathObj = path.parse(fPath);
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let fUid = farmhash.fingerprint32(fldName + '/' + f);
return fs.statAsync(fPath)
.then((s) => {
if(!s.isFile()) { return false; }
// Get MIME info
let mimeInfo = fileType(readChunk.sync(fPath, 0, 262));
// Images
if(s.size < 3145728) { // ignore files larger than 3MB
if(_.includes(['image/png', 'image/jpeg', 'image/gif', 'image/webp'], mimeInfo.mime)) {
return lcdata.getImageMetadata(fPath).then((mData) => {
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let cacheThumbnailPath = path.parse(path.join(dataPath, 'thumbs', fUid + '.png'));
let cacheThumbnailPathStr = path.format(cacheThumbnailPath);
mData = _.pick(mData, ['format', 'width', 'height', 'density', 'hasAlpha', 'orientation']);
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mData.uid = fUid;
mData.category = 'image';
mData.mime = mimeInfo.mime;
mData.folder = fldName;
mData.filename = f;
mData.basename = fPathObj.name;
mData.filesize = s.size;
mData.uploadedOn = moment().utc();
allFiles.push(mData);
// Generate thumbnail
return fs.statAsync(cacheThumbnailPathStr).then((st) => {
return st.isFile();
}).catch((err) => {
return false;
}).then((thumbExists) => {
return (thumbExists) ? true : fs.ensureDirAsync(cacheThumbnailPath.dir).then(() => {
return lcdata.generateThumbnail(fPath, cacheThumbnailPathStr);
});
});
})
}
}
// Other Files
allFiles.push({
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uid: fUid,
category: 'file',
mime: mimeInfo.mime,
folder: fldName,
filename: f,
basename: fPathObj.name,
filesize: s.size,
uploadedOn: moment().utc()
});
});
}, {concurrency: 3});
});
}, {concurrency: 1}).finally(() => {
ws.emit('uploadsSetFiles', {
auth: WSInternalKey,
content: allFiles
});
});
return true;
});
}));
// ----------------------------------------
// Run
// ----------------------------------------
Promise.all(jobs).then(() => {
winston.info('[AGENT] All jobs completed successfully! Going to sleep for now.');
}).catch((err) => {
winston.error('[AGENT] One or more jobs have failed: ', err);
}).finally(() => {
jobIsBusy = false;
});
},
start: false,
timeZone: 'UTC',
runOnInit: true
});
// ----------------------------------------
// Connect to local WebSocket server
// ----------------------------------------
ws.on('connect', function () {
winston.info('[AGENT] Background Agent started successfully! [RUNNING]');
job.start();
});
ws.on('connect_error', function () {
winston.warn('[AGENT] Unable to connect to WebSocket server! Retrying...');
});
ws.on('reconnect_failed', function () {
winston.error('[AGENT] Failed to reconnect to WebSocket server too many times! Stopping agent...');
process.exit(1);
});
// ----------------------------------------
// Shutdown gracefully
// ----------------------------------------
process.on('disconnect', () => {
winston.warn('[AGENT] Lost connection to main server. Exiting...');
job.stop();
process.exit();
});
process.on('exit', () => {
job.stop();
});